Math Chapter Wise Limit, Continuity And Differentiability Of Function Of Two Variables And Partial Differentiation English MCQ UP PCS (Pre) 2008 Q.If u = loge(x3 +y3 +z3) than ∂ ∂ ∂ + + ∂ ∂ ∂ u u u x y z is equal to A1 x y z + + B2 x y z + + C3 x y z + + D()2 3 x y z + + Show answer Correct answer: 3 x y z + +